#include <iostream>
#include <cstring>
#include<cstdlib>

     int main(){
         while(1){
             char c1, c2, n[100];
             std::cin>>n>>c1>>c2;
            if(n[0] == '0' && n[1] == 0 && c1 == '0' && c2 == '0')
                break;
            for (int i = 0 ; i < strlen(n) ; i++)
                if(n[i] == c1)
                   n[i] = c2;
            std::cout<<atoi(n)<<'\n';
        }
        return 0;
   }